Study On Coal Mining Subsidence Mechanism And Surface Displacement Deformation Prediction

Large scale mining of underground coal resources causes or brings out hazards of geological environment including sinking,fault and fracture of the ground,which are called coal-mining-induced subsidence.As to the growing demand for coal resources in our country,coal mine industry has become the core of the economic development. How-ever, vigorous development in coal industry promote the regional economic development,and at the same time caused serious problems,restrict the hamonious development of the regional economy.It has become one of main factors that restrict development of economy and social advancement of coal mining areas.Mining subsidence prediction is one of the core contents in minint subsidence subiect.With the prediction results,we can quantitatively research on the distribution law of strata and ground movement effcetde by the mining in time an space.It is important to guide the mining practice,which are under buildings,railways and water.The groud movement and deformation prediction mainly includes:the prediction after mining and ground subsidence basin in stable and dynamic prediction during mining.In the cuirrent theory of mining subsidence pridiction,the basi method is to predict the un-subsidence area by the experience from the area where the subsidence has occurred.By the way,the prediction is mainly made statically.But sometimes in actual production dynamic deformation is more with practical significance. On the basis of the measred data,summing rules and get the typical curve in the process of mining.The probability integral method is very important in mining subsidence prediction in our country.On the basia of studying the theory,this thesis implements movecment and deformation prediction in the mian profile of ground susbidence basin.By dealing with the measured data collected,get the surface movement and distortion;compare the results with the rusults obtained by probability integral method.In addtion,based on the finite element numerical simulation,the paper analyzes the rule the surface movement and deformation in the mining process.It is consistent with the actual situation.